The pointing position of a pointing device is measured based on position and orientation information of the pointing device. The side face of the step portion forms an obtuse angle with respect to the upper surface of the second region, and the insulating film has a substantially uniform thickness on the step portion. An electromagnetic valve operating mechanism electromagnetically openscloses the first intake valve. The double focusing mass spectrometer includes an electric sector energy analyzer that includes a first element located on an inside surface of the first plate, and a second element located on an inside surface of the second plate. A group of shoppers and associated interests are characterized resulting in a creation of a group of recommended products. After authoring of the presentation is completed, the authoring tool assists in encoding and transferring the presentation for distribution.